ZBS Index What actually exists in applied AI, with the source next to it

Retrieval

Everything here was classified as retrieval by keyword match against the maintainer's own description, so treat the grouping as a starting point rather than a verdict.

The list is ordered by the most recent commit, not by stars. A popular project that stopped in 2024 is not a better answer than a smaller one shipped last week.

Listed, not yet verified by us (60)

Published to the registry, but we have not yet checked its repository. Treat the entry as the maintainer’s claim only.

  • Dark Search Protocol — v0.8.0
    161 dark data sources, 25+ domains, 6-step pipeline, Streamable HTTP + stdio
  • Dabble Me Journal — v1.0.0
    Private journal MCP server to search, analyze, and create Dabble Me entries securely via OAuth.
  • io.github.partstable/partsiq — v1.0.0
    Parts research for IT hardware brokers: PN normalization, validation, and pricing
  • Patsnap Patent & Literature Search — v1.2.0
    Search 200M+ patents and 216M+ scientific papers using natural language and structured filters.
  • IndieStack — v1.12.0
    Search 3,100+ developer tools via MCP. Install commands, compatibility data, health scores.
  • io.github.patwalls/superhighway-mcp — v1.2.0
    Web search for AI agents — 5 tools: search, news, images, scrape, research. x402/USDC or API key.
  • io.github.paulbreuler/limps — v3.4.0
    MCP planning server for AI agents — plan management, full-text search, and task lifecycle
  • BAILII UK Case Law — v1.0.1
    Search UK case law on BAILII — court judgments with section extraction. Runs locally.
  • UK Legal Research — v0.4.0
    UK legal research — case law, legislation, Hansard, bills, votes, committees, HMRC, citations
  • Harness Atlas — v0.1.0
    Search 500+ wire-harness & cable-assembly manufacturers by country, industry, and capability.
  • PayU Docs — v1.0.0
    Search PayU docs, browse the payment integration catalog, and fetch production-ready code.
  • io.github.pcmarts/recruiter-roles-mcp — v1.0.0
    Search Recruiter Roles: live recruiter jobs, companies, sectors, locations, and market stats.
  • io.github.pcmedsinge/mcp-fhir — v1.1.1
    FHIR R4 read/search/validate MCP server — US Core/IPS profiles, SMART-on-FHIR auth (Epic/Cerner).
  • io.github.pcmedsinge/mcp-terminology — v1.0.0
    LOINC/SNOMED CT/RxNorm/ICD-10 lookup, search, translation and ValueSet expansion via FHIR.
  • Penfield Memory — v1.22.0
    Persistent memory and knowledge graphs for AI agents. Hybrid search, context checkpoints, and more.
  • io.github.penny4nonsense/mcp-scholaris — v0.1.4
    Academic paper search and retrieval via arXiv, Semantic Scholar, PubMed, Unpaywall.
  • io.github.perkinsandre/investra-ai-mcp — v2.3.0
    Real estate investment intelligence: search, comps, cash flow, off-market leads, skip trace.
  • Perplexity API Platform (moved to ai.perplexity/mcp-server) — v0.7.1
    Real-time web search, reasoning, and research through Perplexity's API
  • Perseus Vault (formerly Mimir/Mneme), persistent memory engine for AI agents — v2.15.0
    Local-first MCP memory server: SQLite, FTS5 and vector search, AES-256-GCM. 55 tools, no cloud.
  • io.github.Perufitlife/deep-research-mcp-server — v1.0.2
    Web search, clean page reading & one-call research dossiers for AI agents. No API key.
  • Semantic API — v0.1.2
    Search and discover any API using natural language. 163+ providers with auto-discovery.
  • Soluble(s) — Podcast de journalisme de solutions — v1.2.0
    Solutions journalism podcast (FR): ecology, climate, society. Search, transcripts, junior versions.
  • io.github.peureka/agentlookup-mcp — v1.0.1
    Search, discover, and register AI agents in the public registry at agentlookup.dev.
  • io.github.pfeilisolana/scry-mcp — v0.1.0
    Keyless MCP bridge to Scry Solana wallet intel: free coverage check, catalog, x402 paid endpoints.
  • VectorCache Semantic Vector Cache — v1.0.2
    x402-gated semantic vector cache for agent swarms: Redis-backed similarity lookup. Paid in USDC.
  • io.github.pgEdge/postgres-mcp — v1.0.0
    Enterprise PostgreSQL MCP server with NL queries, hybrid search (pgvector+BM25), and web UI
  • Palinode — v0.10.1
    Git-versioned markdown memory for AI agents: save, search, compact, lint, and audit.
  • MCP DB Connect — v0.1.21
    MCP server for Oracle, MSSQL, PostgreSQL, MySQL, SQLite, MongoDB, and Qdrant vector search access.
  • AgentData - Executable Liquidity / Exit-Cost — v0.1.0
    Size-aware exit cost, depeg risk & liquidity fragility for a Base token (x402, testnet).
  • io.github.philmccarty/apple-search-ads-mcp — v1.0.0
    Apple Search Ads MCP: campaign analytics, bid management, and attribution tracking.
  • io.github.phuongddx/codeintel — v0.4.0
    Local-first SCIP code navigation and Zoekt search over your own indexed repositories
  • io.github.phuongddx/jarvis — v0.5.1
    Local-first SCIP code navigation and Zoekt search over your own indexed repositories
  • io.github.piiinpiiins/zotero-mcp-local — v0.1.4
    Search, read PDFs, and find related papers in your local Zotero library. Read-only, 100% local.
  • io.github.pijusz/mcp-gsc — v0.1.7
    Google Search Console MCP server — query performance, sitemaps, indexing & more
  • Skill History — v1.0.0
    Track download history for 70,000+ agent skills. Search and get daily snapshots.
  • Altos — v0.1.0
    Altos Research MCP — Real estate market intelligence
  • Arcgis Hub — v0.1.0
    ArcGIS Hub — open government geospatial data (search + Feature Service query).
  • Arxiv — v0.1.0
    arXiv MCP — preprint server search (free, no auth)
  • Asub Ax — v0.1.0
    Statistics and Research Åland (ÅSUB) PxWeb MCP.
  • Box — v0.1.0
    Box (enterprise cloud storage) MCP Pack
  • Brave Search — v0.1.0
    Brave Search MCP — independent web index (no Google/Bing dependency)
  • Ca Procurement — v0.1.0
    California state contract awards & purchase orders: search, top vendors, agency spend — keyless
  • Clinicaltables — v0.1.0
    NIH Clinical Tables: ICD-10/9, RxTerms, LOINC, NPI, conditions search. Keyless.
  • Commons Wikimedia — v0.1.0
    Wikimedia Commons file/image/audio/video search via MediaWiki Action API
  • Congressional Documents — v0.1.0
    Congressional Documents — full-text search and retrieval over the official
  • Dart Kr — v0.1.0
    DART — Korea's Data Analysis, Retrieval and Transfer System.
  • Datacite — v0.1.0
    DataCite MCP — DOIs for research datasets (free, no auth)
  • Dataverse Harvard — v0.1.0
    Harvard Dataverse — research dataset repository (~150k datasets)
  • Deezer — v0.1.0
    Deezer public music catalog (search/tracks/albums/artists/charts)
  • Devdocs Io — v0.1.0
    DevDocs.io keyless docs index + entry search + content (Angular, MDN, Rust, etc.).
  • Domains — v0.2.1
    Domains MCP — domain registration lookup + availability search over live
  • Duffel — v0.1.0
    Duffel MCP — live flight search + pricing via the Duffel Flights API (duffel.com)
  • Eu Funding Tenders — v0.1.0
    EU Funding & Tenders Portal (SEDIA search API) MCP.
  • Europepmc — v0.1.0
    Europe PubMed Central — biomedical literature search and full text
  • Exa — v0.1.0
    Exa MCP — neural/semantic web search + content retrieval (exa.ai)
  • Figshare — v0.1.0
    Figshare research outputs (datasets, papers, posters)
  • Frinkiac — v0.1.0
    Quote-based screencap search for Simpsons, Futurama, Rick and Morty
  • Gnews — v0.1.1
    GNews MCP — Global news search via GNews API (gnews.io)
  • Google_search_console — v0.1.0
    Google Search Console MCP Pack
  • Gov Uk Content — v0.1.0
    GOV.UK Content + Search APIs (every gov.uk page + full search)

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How this page is ordered

Entries are grouped by whether anyone is still working on them, using the date of the most recent push to the repository. They are not ordered by stars, because a star is a bookmark somebody left once and never took back.

Where we have not checked an entry yet, it says so rather than being mixed in with the verified ones.